EP0843709A1 - Removable adhesive tape with controlled sequential release - Google Patents
Removable adhesive tape with controlled sequential releaseInfo
- Publication number
- EP0843709A1 EP0843709A1 EP96925279A EP96925279A EP0843709A1 EP 0843709 A1 EP0843709 A1 EP 0843709A1 EP 96925279 A EP96925279 A EP 96925279A EP 96925279 A EP96925279 A EP 96925279A EP 0843709 A1 EP0843709 A1 EP 0843709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tape
- aggressive
- ofthe
- adhesive
- adhesively
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
- A47G1/16—Devices for hanging or supporting pictures, mirrors, or the like
- A47G1/17—Devices for hanging or supporting pictures, mirrors, or the like using adhesives, suction or magnetism
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
- A47G1/16—Devices for hanging or supporting pictures, mirrors, or the like
- A47G1/17—Devices for hanging or supporting pictures, mirrors, or the like using adhesives, suction or magnetism
- A47G1/175—Stretch releasing adhesives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/26—Porous or cellular plastics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/308—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive tape or sheet losing adhesive strength when being stretched, e.g. stretch adhesive
Definitions
- the present invention relates to adhesive tapes which can be adhered to a surface and thereafter removed without substantially damaging the surface or leaving substantial adhesive residue. More particularly, the present invention includes a controlled sequential release of adhesive surfaces of a double-sided stretchable adhesive tape product.
- Adhesive products have been designed which are created specifically to enhance their ability to be removed from a substrate after being adhered to such substrate without substantially damaging the substrate surface or leaving substantial adhesive residue thereon.
- Products include items such as paper notes having a layer of easily removable adhesive adhered to one surface, such as the Post-itTM Note products available from Minnesota Mining and Manufacturing Company of Saint Paul, Minnesota. It is also known to provide double-sided adhesive products including similar easily-removable adhesive.
- a single-sided or double-sided adhesive tape having conventional pressure-sensitive adhesive on one or both major surfaces thereof, and which includes a tape backing comprising a highly extensible material.
- a tape backing comprising a highly extensible material.
- These tapes operate in that when the backing is stretched after the tape is adhered on one side or both sides, the adhesive stretches and undergoes clean interfacial debonding from the substrate or substrates to which it is adhered. Such removal typically progresses from one end ofthe tape to the other as the tape backing is stretched at an angle preferably no greater than about 35° from the surface ofthe substrate. That is, as the tape is stretched from one end, it debonds from the end being stretched toward its distal end.
- the adhesive tapes described in the aforementioned European Patent Application 92.903259.7 include plastic backings. That means, as the backing is stretched, it is permanently deformed and has relatively low elastic recovery. Tapes described include single-sided tapes, double-sided tapes, and tapes comprising film layers, foam layers, and laminates of films and/or foams. In double-sided adhesive tape constructions, both adhesive surfaces debond at the same time and progress substantially at the same rate from the stretched end toward the distal end as the tape backing is stretched.
- stretchable release adhesive tape is described in United States Patent No. 5,409, 189 to L ⁇ hmann, wherein the adhesive tape backings utilized comprise elastic materials.
- Elastic as opposed to plastic materials described above, means materials that are stretchable without substantial plastic deformation and which have high elastic recovery after stretching and release.
- elastic tapes can be single-sided or double-sided and the stretching ofthe backing causes adhesive stretching and subsequent debonding ofthe adhesive surface or surfaces from the stretched end to the distal end as the tape is stretched.
- Double-sided adhesive tapes are particularly useful in joining and mounting applications. Stretchable release double-sided tapes provide secure bonding to both surfaces with clean removal from both surfaces without substantial damage or adhesive residue. A problem is that such double-sided adhesive tapes simultaneously debond from both adhered sides as the tape is stretched for removal. In applications where these tapes are used to adhere an object to a wall or other surface, the release from both the object and the other surface at the same time may cause the adhesive tape to snap back in the direction ofthe stretching, similar to the snapping effect of a stretched rubber band, or may cause the object to be catapulted, particularly if the object is not held while being removed. This snap- back ofthe tape occurs at the point of adhesive release when the resisting force of adhesion to the wall suddenly drops to zero.
- stretchable tapes are known to be applicable for many applications including the mounting of objects, such as hooks or other hanging devices, to walls, etc.; joining or assembly applications; cushioning or sound- deadening applications; closure applications, such as container closures, e.g. closures for boxes, food and beverage containers; and removable labels.
- the present invention provides an improvement to double-sided stretchable adhesive tapes for use in conventional applications, particularly including the mounting or joining of an object to another surface.
- the improvement lies within the ability to control the timing ofthe debonding of both surfaces so that one adhesive surface releases before the other. In this way, the aforementioned problems can be minimized.
- the earlier release can be either on the object side or the surface side, depending on the desired effect.
- the present invention is applicable to all stretchable tape constructions, including the use of plastic backing materials and/or elastic backing materials.
- the improvement allows such an object to be removed without risking substantial snap-back ofthe adhesive tape or catapulting of the object.
- Tape constructions according to the present invention are those in which side-to-side debonding ofthe tape is sequential, i.e., one side ofthe tape completes debonding prior to the debonding ofthe opposite side ofthe tape.
- a double-sided adhesive tape comprising a solid adhesive, or having a stretchable backing layer, plastic or elastic, and having a lower-adhesion or non-adhesive portion of one adhesive surface, so that a corresponding greater adhesion adhesive portion ofthe other side remains more aggressively adhered to a surface during stretch removal while the portion ofthe one adhesive surface is less aggressively adhered or completely released from its surface.
- a non-adhesive portion may be adhesive-free, or may be an adhesive layer portion which is rendered non-adhesive.
- a lower-adhesion portion may comprise a low adhesion material, i.e., a weaker adhesive, or may be rendered lower in adhesion by a treatment or coating.
- a release strip is preferably used to deaden the adhesive on the one side which is to be positioned adjacent the effective end ofthe object or the end ofthe surface to which the adhesive tape is to be applied.
- the one side completely debonds from its adhered surface prior to the complete debonding ofthe other side.
- the non-adhesive portion of one adhesive surface can be rendered non ⁇ adhesive, as noted above, by providing such a release strip, or such portion may simply be adhesive-free.
- Alternatives useable for release strips include films, papers, powders, foams, inks, other coatings or treatments, and the like, which can be used to render an adhesive layer non-adhesive.
- a tape adapted for attaching first and second structures to each other.
- the tape has first and second opposite ends spaced in a first direction, opposite first and second primary outer surfaces extending between those ends, a manually engageable tab portion adjacent its first end, and an attachment portion between its manually engageable portion and its second end.
- the attachment portion comprises a layer of aggressive pressure sensitive adhesive providing an adhesively aggressive portion of each ofthe outer surfaces.
- Each adhesively aggressive portion has a primary end adjacent the first end ofthe tape, a secondary end adjacent the second end ofthe tape and is adapted to be firmly adhered to a different one ofthe structures between its primary and secondary ends.
- the attachment portion is stretchable so that the attachment portion when between and adhered to the structures can be progressively stretched along its length by the manual application of force to the manually engageable portion to cause separation ofthe adhesively aggressive surface portions from the structures progressively from their primary ends towards their secondary ends.
- the secondary ends ofthe adhesively aggressive surface portions are spaced from each other in the first direction to cause separation of one ofthe adhesively aggressive surface portions from one ofthe structures prior to separation ofthe other ofthe adhesively aggressive surface portions from the other ofthe structures.
- the tape can comprise a single layer of pressure sensitive adhesive providing both ofthe adhesively aggressive portions ofthe outer surfaces and including a masking layer of material having either no adhesive properties or adhesive properties that are significantly reduced from the layer of pressure sensitive adhesive adjacent the second end ofthe tape and extending over a part ofthe layer of pressure sensitive adhesive defining one ofthe adhesively aggressive portions of the outer surfaces to space the secondary ends ofthe adhesively aggressive portions ofthe outer surfaces from each other.
- That material in the masking layer can, for example, be release liner material, repositionable pressure sensitive adhesive, polymeric film, or low adhesion backsize material.
- the tape includes a stretchable polymeric backing layer having a layer of aggressive pressure sensitive adhesive along each of its opposite major surfaces defining one of its adhesively aggressive portions of its outer surfaces.
- That polymeric backing layer can, for example, be of polymeric film, polymeric foam, polymeric film laminated to polymeric foam, or two layers of polymeric film laminated on opposite sides of a layer of polymeric foam.
- the ends adjacent the tape's second end ofthe layers of aggressive pressure sensitive adhesive on both major surfaces ofthe backing layer can extend to the same location with respect to the second end ofthe tape, and the tape can include a masking layer of material having either no adhesive properties or adhesive properties that are significantly reduced from the layer of pressure sensitive adhesive adjacent the second end ofthe tape and extending over a part of one ofthe layers of aggressive adhesive to space the secondary ends ofthe adhesively aggressive portions ofthe outer surfaces from each other
- ends adjacent the tape's second end ofthe layers of aggressive adhesive on both major surfaces ofthe backing layer can define the secondary ends ofthe adhesively aggressive portions ofthe outer surfaces and can extend to different locations with respect to the second end ofthe tape to space the secondary ends ofthe adhesively aggressive portions ofthe outer surfaces from each other.
- an assembly that causes one adhesive surface to release before the other can comprise a tape attaching first and second structures to each other in which the first structure has a rear surface portion adapted to be adhered to that extends to an edge at which the rear surface ends or past which the rear surface can not be adhered to (i.e., because of surface treatments such as release material or surface texture).
- the tape has first and second opposite ends spaced in a first direction, opposite first and second primary outer surfaces extending between its ends, a manually engageable tab portion adjacent its first end, and an attachment portion between its manually engageable portion and its second end.
- the attachment portion comprises a layer of aggressive pressure sensitive adhesive providing an adhesively aggressive portion of each ofthe outer surfaces, each adhesively aggressive portion having a primary end adjacent the first end ofthe tape, a secondary end adjacent the second end ofthe tape and being firmly adhered to a different one ofthe structures.
- the adhesively aggressive portion adhered to the first structure is adhered to its rear surface with the edge spaced in the first direction from the primary end ofthe adhesively aggressive portion adhered to the second structure and with the adhesively aggressive portion adhered to the second structure at its secondary end.
- the attachment portion is stretchable so that the attachment portion between and adhered to the structures can be progressively stretched along its length by the manual application of force to the manually engageable portion to cause separation ofthe adhesively aggressive surface portions from the structures progressively from their primary ends towards their secondary ends.
- the spacing between the edge and the secondary end ofthe adhesively aggressive surface portion adhered to the second structure cause separation ofthe adhesively aggressive surface portion from the first structure prior to separation of the other ofthe adhesively aggressive surface portions from the second structure.
- FIGURE 1 is an enlarged side view in cross-section of a first embodiment of an adhesive tape construction in accordance with the present invention
- FIGURE 2 is an enlarged side view in cross-section of an alternate construction ofthe adhesive tape of Figure 1
- FIGURE 3 is an enlarged side view in cross-section of yet another alternative construction ofthe adhesive tape of Figure 1 ;
- FIGURE 4 is an enlarged side view in cross-section ofthe adhesive tape construction of Figure 2 shown adhered between a substrate and a mounted object
- FIGURE 5 is an enlarged side view in cross-section ofthe adhesive tape construction of Figure 2 shown between a substrate and a mounted object like Figure 4, but with a release strip included in the tape construction positioned against the mounted object rather than against the substrate;
- FIGURE 6 is an enlarged side view in cross-section ofthe adhesive tape construction, substrate, and mounted object as shown in Figure 5, but with a backing layer in the tape construction partially stretched and just prior to any debonding of adhesive layers included in the tape construction;
- FIGURE 7 is an enlarged side view in cross-section similar to Figure 6, but with the backing layer further stretched and with both adhesive layers partially debonded from the substrate and mounted object;
- FIGURE 8 is an enlarged side view in cross-section showing a further release step after that shown in Figure 7, wherein the adhesive layer that was adhered to the mounting object is entirely debonded while a corresponding portion ofthe adhesive layer adhering to the substrate surface is still adhered;
- FIGURE 9 is an enlarged side view in cross-section of a second embodiment of an adhesive tape construction in accordance with the present invention comprising a film/foam laminate;
- FIGURE 10 is an enlarged side view in cross-section of a third embodiment of an adhesive tape construction in accordance with the present invention comprising a foam/film/film laminate;
- FIGURE 11 is an enlarged side view in cross-section of a fourth embodiment of an adhesive tape construction in accordance with the present invention comprising a foam/film/foam laminate;
- FIGURE 12 is an enlarged side view in cross-section of a fifth embodiment of an adhesive tape construction in accordance with the present invention comprising a film/foam/film laminate; and FIGURE 13 is an enlarged side view in cross-section ofthe sequential release tape construction in accordance with the present invention showing an alternative mounting application.
- the first adhesive tape construction 1 is particularly designed for stretching the entire tape 1 to effect debonding, as will be more fully described below.
- the tape 1 comprises a backing layer 12 and adhesive layers 14 and 16 ofthe same or different pressure-sensitive adhesive compositions on opposite major surfaces thereof.
- Adhesive layers 14 and 16 are preferably protected by liners 18 and 20, respectively, before the adhesive tape 1 is put into use.
- the backing layer 12 comprises a polymeric foam layer.
- the backing layer 12 can alternatively comprise a polymeric film layer.
- the choice of polymeric foam or polymeric film depends on the specific application for the tape 1.
- Polymeric foams can be chosen to optimize conformability and resiliency properties which are helpful when the tape 10 is to be adhered to surfaces having surface irregularities. Such is the case with a typical wall surface.
- Polymeric films may be used instead to increase load bearing strength and rupture strength ofthe tape; however, films are more suitable when the application is to adhere two very smooth surfaces together.
- solid adhesives can be used instead ofthe combination of a film or foam with two adhesive layers.
- Known stretchable solid adhesives which are generally elastic in nature and usable include rubber-based and acrylate-based solid adhesives.
- a feature ofthe present invention which permits a controlled sequential release, described below, is accomplished by the provision of a release strip 22, which is preferably positioned at a distal or second end 24 ofthe tape 1 away from a tab portion 26 adjacent an opposite first end ofthe tape 1.
- the tab 26 provides a means by which the backing layer 12 can be gripped by a user for effecting the stretch release ofthe tape 1.
- the purpose ofthe release strip 22 is to provide a non-adhesive zone of one ofthe adhesive layers 14 or 16 at the effective or functional end (distal or second end 24 as shown in Figure 1) ofthe tape 1.
- the release strip 22 can comprise a portion ofthe liner 18 which is simply cut from the liner 18 as shown at 28.
- release strip 22 may comprise the same material as the liner 18.
- the release strip 22 preferably covers the entire transverse width ofthe tape 1, the purpose of which is to provide a non-adhesive zone so that when the tape 1 is applied after liners 18 and 20 are removed, release strip 22 prevents the covered portion of adhesive 14 or 16 from adhering to any surface.
- a tape 10 can comprise a release strip 30 separately provided to cover a portion of adhesive layer 14 or 16.
- the release strip 30 covers a portion of adhesive layer 14 and is provided separately from a liner 32.
- the liner 32 is illustrated covering the release strip 30; however, the liner 32 need not necessarily cover release strip 30.
- the release strip 30 can comprise a silicone release paper which may be the same or different from the material ofthe liner 32, or may comprise any conventional material for rendering a portion ofthe adhesive 14 or 16 non-adhesive.
- a non-adhesive portion 34 can be provided by simply not coating the adhesive layer 36 all the way to the distal end 38 ofthe adhesive tape.
- a liner 40 may also preferably be provided which ends at the end of adhesive layer 36, although it may extend further to cover the non-adhesive portion 34.
- a specific mounting or joining application for the tape 10, of Figure 2, in accordance with the present invention is shown in Figure 4.
- Tape 10 is shown positioned between and adhered to a mounting object, specifically a hook 42, and a substrate, such as a wall, shown partially at 44.
- adhesive layer 16 is adhered to the hook 42 while adhesive layer 14 is adhered to the wall 44.
- Adhesive layer 16 preferably corresponds with the surface ofthe hook 42 to which it is adhered such that tab 26 extends from the hook 42 to facilitate stretch removal ofthe tape 10.
- adhesive layer 14 is preferably similarly configured.
- the release strip 30 is positioned against a portion ofthe wall 44 corresponding to an end portion of hook 42 away from tab 26.
- the mounting configuration of Figure 4 will permit a sequential release ofthe double-sided adhesive tape structure 10 first from the wall 44 and then from the hook 42 during stretch release.
- the release strip 30 effectively prevents bonding in that area and therefore releases the tape 1.0 from the wall 44 when the stretch release progresses up to the inner leading edge 46 ofthe release strip 30.
- the release of adhesive layer 16 progresses substantially evenly with the release of adhesive layer 14 so that a portion 50 of adhesive layer 16 is still adhered to the hook 42 when the stretch release progresses to the inner leading edge 46 of release strip 30 at which instance the adhesive layer 14 is entirely released then from wall 44.
- Figure 5 shows the same tape 10 of Figure 2, in a similar application as in Figure 4, but with the adhesive tape 10 reversed between hook 42 and the wall 44.
- adhesive layer 14 is adhered to the back surface of hook 42 and adhesive layer 16 is adhered to the wall 44.
- Tab 26 extends from under the hook 42 to facilitate stretch removal, and the release strip 30 is positioned against the effective end ofthe back surface of hook 42 and at the end of tape 10 away from tab 26. More preferably, release strip 30 lies against the back surface of hook 42 away from tab 26 completely to the edge ofthe back surface of hook 42.
- a progressive stretch release will cause adhesive layers 14 and 16 to simultaneously debond from the tab end 26 toward the release strip 30.
- FIGs 6, 7, and 8 Such progressive stretch release and removal of an object such as hook 42 from a wall 44, is illustrated in Figures 6, 7, and 8.
- Figure 6 After a force F is applied to tab 26, the backing layer 12 making up tab 26 is stretched.
- Figure 6 shows the tape 10 with the tab 26 stretched but just before any debonding of adhesive layers 14 or 16.
- Figure 7 shows such a progressive debonding at about the point ofthe half-way debonding of both adhesive layers 14 and 16.
- the adhesive layers 14 and 16 stretch and pull away from their respective surfaces and debond.
- Figure 8 shows the point of progressive debonding where the debonding of adhesive layer 14 reaches the inner leading edge 46 of release strip 30. At this point, the release strip 30, together with the progressive adhesive stretching up to inner leading edge 46, entirely releases the surface of hook 42 from the tape 10. Meanwhile, a portion 48 of adhesive layer 16 is still adhered to the wall 44.
- the stretch release of tape 10 permits the hook 42 to simply fall or be easily removed from its mounted position on the wall 44 while the tape 10 is still adhered to the wall 44. This way, no additional force which otherwise might tend to catapult the hook 42 is exerted onto the hook 42 by the stretched tape 10 at the point of complete debonding ofthe hook 42 from tape 10. After hook 42 is released, continued stretching will simply cleanly release the remainder portion 48 of adhesive layer 16 from wall 44. Alternatively, the remaining portion 48 could simply be peeled from the wall 44.
- the remaining adhesive tape 10 can be stretched and cleanly removed from the hook 42.
- the remaining portion 50 of tape 10 can be peeled from the hook 42, although it is preferred to complete the stretch removal so that no residue is left on the surface of hook 42 and the hook 42 can be reused.
- the release strip 30 provides the controlled early release of one ofthe adhesive layers relative to the other as caused by the simultaneous progressive debonding of both adhesive layers 14 and 16 from the tab end 26 up until the debonding reaches the inner leading edge 46 ofthe release strip 30.
- the length ofthe release strip 30 (the longitudinal dimension in the direction ofthe cross-section ofthe Figures) thus determines how early the first adhesive layer 14 releases before release ofthe second adhesive layer 16.
- the area of release strip 30 substantially defines the size ofthe corresponding adhesive portions 48 and 50 which remain adhered after complete debonding ofthe first adhesive layer 14 during stretch release.
- the length of release strip 30 it is desirable to minimize the length of release strip 30 in order to ensure sufficient adhesive connection between the adhesive layer 14 ofthe tape 10 and either the hook 42 or wall 44; however, it is preferable that the length of release strip 30 be sufficient such that a total debonding ofthe one adhesive surface with release strip 30 occurs prior to any potential sheer failure ofthe adhesive making up the area ofthe remaining portion 48 or 50.
- This of course depends on the properties ofthe backing with respect to its Young's modulus and elongation characteristics and the specific pressure-sensitive adhesive making up the adhesive layer 16. With a low modulus material, the tape backing is more easily stretchable and less length ofthe release strip is required to provide the sequential debonding. With a higher modulus material, the tape backing is harder to stretch and a greater length ofthe release strip might be required.
- An additional advantage ofthe tape constructions described above is the reusability of mounting objects or hooks.
- the adhesive layer 36 When utilizing a tape construction as shown in Figure 3 at 10' having a non ⁇ adhesive portion 34 instead of a release layer, the adhesive layer 36 will completely debond from the surface to which it is attached when the adhesive layer 36 is stretched up to its trailing edge 37 defining the non-adhesive portion 34. At that instance, a corresponding portion of adhesive layer 16 will still be adhered.
- Tape 100 comprises a polymeric foam layer 102 and a polymeric film layer 104 adhered to one another by a layer of pressure-sensitive adhesive 106.
- foam layer 102 and film layer 104 could be otherwise laminated by heat or by co ⁇ extrusion, or the like.
- Polymeric film layer 104 may be used to increase the load bearing strength and rupture strength ofthe tape 100, particularly where polymeric foam layer 102 lacks properties otherwise required in a backing to permit removal by stretching. Inclusion ofthe film layer 104 therefore permits greater latitude in the selection of foam layer 102 to optimize, for example, the conformability and resiliency properties.
- the entire tape laminate ofthe sequential release tape 100 is designed to be stretched for removal.
- the foam layer 102, film layer 104, and pressure-sensitive adhesive layer 106 constitute the backing ofthe tape 100.
- Foam layer 102 and film layer 104 also have adhesive layers 108 and 1 10, respectively, ofthe same or different pressure- sensitive adhesive compositions coated thereon for adhering tape 100 to an object such as hook 1 12 and the surface of a substrate such as a wall 1 14.
- this tape construction is particularly suited for stretching the entire tape to effect debonding from both hook 1 12 and wall 1 14, which permits easy reusability ofthe hook 112.
- a tab 1 16 is formed to facilitate the stretch removal of tape 100.
- Tab 1 16 is preferably made by simply not providing adhesive layers 108 and 1 10 at an end region ofthe backing. Otherwise, a coating, film, or the like, could be applied over adhesive layers 108 and 1 10, if extended over the entire backing, to form the tab 1 16.
- a release strip 1 18 is also provided covering at least an effective end portion of adhesive layer 108 or 1 10.
- the effective or functional end of tape 100 opposite from the formation of tab 1 16 means the portion of adhesive layer 108 or 1 10 which is to be covered by release strip 118 in order to cause sequential release. That is, that one surface will completely debond before the other.
- Sequential stretch release occurs with tape 100 substantially the same as that described above with regard to tape 10. Specifically, as tab 1 16 is grasped and a force applied to stretch the release tape 100, a progressive debonding of adhesive layers 108 and 1 10 occurs at substantially the same time. Again, the debonding occurs substantially simultaneously by stretching adhesive layers 108 and 1 10 as a result ofthe stretching of release tape 100. When the debonding of adhesive layer 108 reaches an inner edge 120 of release strip 118, adhesive layer 108 becomes entirely debonded from the surface to which it is applied, such as the back of a hook 1 12 as shown in Figure 9.
- an adhesive portion 122 substantially corresponding to the dimensions of release strip 1 18 will still remain adhered to the other surface to which the release tape 100 is applied, such as wall 1 14 as shown in Figure 9.
- the hook 1 12 is removed from wall 1 14.
- the remaining adhesive portion 122 can be removed by continued stretching or peeling of tape 100. Stretch removal is preferred since this will not leave adhesive residue on the remaining surface of adherence.
- the release strip side ofthe tape can be applied to the wall surface instead and would be removed in the same manner as described above with first release from the wall 1 14.
- Release tape 200 comprises a laminated film/foam layer 202 which is itself comprised of a polymeric foam layer 204 and a polymeric film layer 206.
- polymeric foam layer 204 and polymeric film layer 206 are heat laminated to one another, although other conventional lamination methods or co-extrusion methods can be utilized, including the use of any number of adhesives.
- a polymeric film layer 208 is further adhered to the film/foam layer 202 by a layer of pressure-sensitive adhesive composition 210.
- film/foam layer 202, polymeric film layer 208, and pressure-sensitive adhesive layer 210 constitute the tape backing.
- Foam layer 204 and film layer 208 bear on their major surfaces adhesive layers 212 and 214 ofthe same or different adhesive compositions for adhering the tape 200 to an object such as hook 216 and another surface such as wall 218.
- a tab 220 is provided comprising a portion ofthe film/foam layer 202, film layer 208, and pressure-sensitive adhesive layer 210 by not providing adhesive layers 212 and 214 on one end of tape construction 200. It is an aspect ofthe tape construction 200 that only the polymeric film layer 208 and adhesive layers 210 and 214 need comprise a stretchable tape material. To facilitate this, the film/foam layer 202 is slit at 222 to define tab 220 for grasping and tape stretching. By virtue of slit 222, grasping tab 220 and stretching of release tape 200 only stretches film layer 208 and adhesive layers 210 and 214. Stretch release debonding thus occurs between adhesive layer 210 and film layer 206 and adhesive layer 214 and the surface of wall 218.
- adhesive layers 210 and 214 become debonded from the surfaces of film layer 206 and the wall 218.
- film layer 208 and adhesive layers 210 and 214 need have the stretch characteristics necessary for stretch release.
- Film layer 206 and foam layer 204 can be chosen based on other desired characteristics. Specifically, the foam can be optimized, for example, for conformability and resiliency properties. Likewise, the film layer 206 can be chosen based on load bearing strength, rupture strength, surface finish, and composition for release characteristics.
- a release strip 224 is provided at the effective or functional end of release tape 200 away from tab 220.
- the release strip 224 facilitates the earlier removal of one ofthe adhesive layers 212 or 214 prior to the other.
- An inner edge 226 of release strip 224 defines the point at which complete release of one adhesive layer occurs while a remaining portion 228 of adhesive remains adhered to the other surface.
- release of adhesive layer 210 from film ' layer 206 occurs prior to the release of adhesive layer 214 from the surface of wall 218.
- Suitable materials for the foam layer 204 and film layer 206 can be any materials that are generally suitable for tape backings and can be chosen to optimize the characteristics noted above.
- layer 204 comprises a polymeric foam material.
- film layer 206 preferably comprises a polymeric film.
- suitable materials may include paper layers or paper products, non-woven webs, foils, and the like.
- Suitable materials for the release strip are any of those described above with reference to tape 10 ofthe first embodiment, specifically including a non-adhesive portion provided instead.
- Release tape 300 comprises a stretchable backing made up of a foam/film/foam laminate including polymeric foam layer 302, polymeric foam layer 304 and polymeric film layer 306.
- Film layer 306 can be conventionally laminated to, co-extruded with, or adhered to foam layers 302 and 304, similarly or differently from one another.
- Foam layers 302 and 304 bear on their major surfaces adhesive layers 314 and 312 ofthe same or different adhesive compositions for adhering the tape 300 to an object such as hook 316 and another surface such as wall 318.
- a tab 320 is provided comprising an extended portion ofthe foam/film/foam backing, preferably by not providing adhesive layers 312 and 314 on one end of tape construction 300.
- a release strip 324 is provided at the effective or functional end of release tape 300 away from tab 320. The release strip 324 provides the controlled early debonding of one of adhesive layers 312 and 314 prior to the other. Inner leading edge 326 of release strip 324 defines the point at which complete debonding of one adhesive layer occurs (adhesive layer 312, as illustrated) while a remaining portion 328 of adhesive remains (of adhesive layer 314, as illustrated) adhered to its surface (wall 318).
- Tape construction 300 permits the foam layers, which can be the same or different, to be collectively or individually optimized for conformability and resiliency to their respective surfaces for adherence.
- the film layer can be selected to enhance elongation, load bearing strength, and rupture strength.
- a fifth embodiment of a sequential release tape 500 according to the present invention for attaching structures such as a hook 501 and a wall 502 to each other is illustrated in Figure 12.
- the release tape 500 has first and second opposite ends 503 and 504 spaced in a first direction, opposite first and second outer surfaces 505 and 506 extending between those ends 503 and 504, a manually engageable tab portion 507 adjacent its first end 503, and an attachment portion 508 between its tab portion 507 and its second end 504.
- the attachment portion 508 comprises two layers 510 and 51 1 of aggressive pressure sensitive adhesive ofthe same or different adhesive compositions providing an adhesively aggressive portion (512 and 513 respectively) of each ofthe outer surfaces 505 and 506.
- the layers 510 and 51 1 of adhesive are adhered along opposite major surfaces of a stretchable backing that is a film/foam/film laminate including a polymeric film layer 515, a polymeric foam layer 516 and a polymeric film layer 517.
- the film layers 515 and 517 can be conventionally laminated to, co-extruded with, or adhered to the opposite sides of the foam layer 516.
- Each adhesively aggressive surface portion 512 or 513 has a primary end (520 and 521 respectively) adjacent the first end 503 ofthe tape 500 and a secondary end (522 and 523 respectively) adjacent the second end 504 ofthe tape 500 and is adapted to be firmly adhered to a different one ofthe structures between its primary and secondary ends 520, 522; 521 ; 523.
- the attachment portion 505 is stretchable so that when the attachment portion 508 is between and adhered to the structures 501 and 502 as illustrated in Figure 12 it can be progressively stretched along its length by the manual application of force to the tab portion 507 to cause separation ofthe adhesively aggressive surface portions 512 and 513 from the structures progressively from their primary ends 520 and 521 towards their secondary ends 522 and 523.
- the secondary ends 522 and 523 ofthe adhesively aggressive surface portions 512 and 513 are spaced from each other in said first direction to cause essentially complete separation ofthe adhesively aggressive surface portion 512 from the structure or hook 501 prior to separation ofthe other adhesively aggressive surface portion 513 from the other structure or wall 502. That spacing is caused in that the ends adjacent the tape's second end 504 ofthe layers 510 and 51 1 of aggressive adhesive on both major surfaces ofthe backing layer that define the secondary ends 522 and 523 ofthe adhesively aggressive surface portions 512 and 513 extend to different locations with respect to the second end 504 ofthe tape 500 to space the secondary ends 522 and 523 of the adhesively aggressive portions 512 and 513 ofthe outer surfaces 505 and 506 from each other.
- the tape 500 thus provides controlled early debonding ofthe adhesive layer
- the secondary end 522 ofthe layer 510 of adhesive 510 defines the point at which complete debonding ofthe adhesive layer 510 occurs while a remaining portion 528 ofthe adhesive layer 51 1 remains adhered to the wall 502.
- the foam layer 516 can be optimized for conformability and resiliency to facilitate adhesion ofthe adhesive layers 510 and 51 1 to surfaces such as those ofthe hook 501 and the wall 502.
- the film layers 515 and 517 can be selected to enhance elongation, load bearing strength, and rupture strength.
- the non-adhesive portion of one ofthe adhesive layers of a double-sided tape construction can instead comprise a low-adhesion portion.
- a low-adhesion portion Such a construction provides a differential debonding and release.
- low-adhesion it is meant that there is a weaker or less aggressive adherence between the adhesive of that portion and the surface to which it adheres as compared to the adherence ofthe adjoining adhesive layer to its substrate.
- the release strip or non-adhesive portion ofthe above embodiments could be substituted with a composition of less aggressive adhesion material.
- Such low-adhesion material can be applied directly to the relevant backing layer or may be coated to the surface ofthe adjoining adhesive layer.
- any adhesive composition exhibiting a lower adhesion than the adjoining adhesive layer is contemplated, including the other compositions ofthe adhesive materials listed below.
- adhesive detackification or coating techniques can be utilized.
- One specific example of a low-tack adhesive deemed suitable for many applications is the adhesive used in making Post-itTM repositionable notes which are commercially available from Minnesota Mining and Manufacturing Company of Saint Paul, Minnesota.
- Post-itTM repositionable notes which are commercially available from Minnesota Mining and Manufacturing Company of Saint Paul, Minnesota.
- the one side will substantially debond and in any case will be easier to remove than the remaining adhesive portion corresponding on the other side of the double-sided stretchable tape construction. At least to some degree, the effects of snap-back and catapulting, discussed above, will be lessened.
- the surface to which the relevant portion (for early release) ofthe object or wall, etc. can be modified to reduce its affinity for the adhesive of one of the adhesion layers of a double-sided stretchable tape.
- the end section ofthe surface of a hook or object to be bonded can be coated with a release material such as a silicone release coating.
- a differential adhesive area on the hook or object may be produced through molding or profiling of a textured area which significantly reduces adhesive contact.
- Yet another way of accomplishing sequential release can be controlled by positioning ofthe hook or object relative to a stretchable double-sided adhesive tape without a differential low-adhesive portion, or a non-adhesive portion
- a tape 400 is illustrated, which is similar to the tape of Figure 1 but with no provision for making a non-adhesive or low-adhesion portion.
- Tape 400 comprises a stretchable backing 402 and adhesive layers 404 and 406 ofthe same or different pressure-sensitive adhesive.
- Stretchable backing 402 can comprise a foam, film or the like, as set out above, or any ofthe possibilities for laminates and alternate constructions suggested above.
- Tape 400 is shown with adhesive layer 404 adhered to the surface of an object, hook 408, and adhesive layer 406 adhered to another substrate, such as wall 410.
- a tab for stretching is shown as 412,
- the surface of hook 408 is adhered to adhesive layer 404 but offset inward from a distal end 414 of tape 400. In this way, the surface of hook 408 will completely debond while leaving a portion 416 of the adhesive layer 406 adhered to the surface of wall 410. Again, stretch removal occurs by applying a force to tab 412 away from the object and subsequent stretching ofthe backing 404 and adhesive layers 404 and 406 with substantially simultaneous progressive debonding. When debonding of adhesive layer 404 reaches the upper edge ofthe surface of hook 408, the hook 408 is completely debonded, while portion 416 remains adhered. It is also contemplated that the manner of application illustrated in Figure 13 and described above can be done in combination with non-adhesive portions, release strips, or low-adhesion portions as described above.
- Suitable materials for any ofthe stretchable layers described in any ofthe embodiments above include any materials which are stretchable without rupture by at least 50 percent elongation at break and which have sufficient tensile strength so as not to rupture before debonding. Again, such stretchable materials may be either elastically deformable or plastically deformable provided sufficient stretching is possible to cause adhesive debonding of both adhesive surfaces for stretch removal. Suitable plastic backing materials are disclosed in co-pending applications
- polystyrene foam or solid polymeric film layer in the backing ofthe tape of this invention ofthe type utilizing a plastic backing include polyolefins, such as polyethylene, including high density polyethylene, low density polyethylene, linear low density polyethylene, and linear ultra low density polyethylene, polypropylene, and polybutylenes; vinyl copolymers, such as polyvinyl chlorides, both plasticized and unplasticized, and polyvinyl acetates; olefinic copolymers, such as ethylene/methacrylate copolymers, ethylene/vinyl acetate copolymers, acrylonitrile-butadiene-styrene copolymers, and ethylene/propylene copolymers; acrylic polymers and copolymers; polyurethanes; and combinations ofthe foregoing.
- polyolefins such as polyethylene, including high density polyethylene, low density polyethylene, linear low density polyethylene, and linear ultra low density polyethylene, polypropylene, and polybut
- Polypropylene/polyethylene, polyurethane/polyolefin, polyurethane/polycarbonate, polyurethane/polyester can also be used.
- Polymeric foam layers for use in the plastic backing ofthe tapes ofthe invention generally will have a density of about 2 to about 30 pounds per cubic foot (about 32 to about 481 kg/m"), particularly in tape constructions where the foam is to be stretched to effect debonding.
- plastic polymeric foam layers in the backing ofthe tapes ofthe invention are polyolefin foams.
- Polymeric foam layers are most preferably polyolefin foams available under the trade designations VolextraTM and VolaraTM from Voltek, Division of Sekisui America Corporation, Lawrence, Massachusetts.
- Elastomeric materials suitable as backings for tapes in accordance with the present invention include styrene-butadiene copolymer, polychloroprene (neoprene), nitrile rubber, butyl rubber, polysulfide rubber, cis-i,4-polyisoprene, ethylene-propylene terpolymers (EPDM rubber), silicone rubber, polyurethane rubber, polyisobutylene, natural rubber, acrylate rubber, thermoplastic rubbers such as styrene butadiene block copolymer and styrene-isoprene-styrene block copolymer and TPO rubber materials.
- Solid polymeric film backings are preferably selected from polyethylene and polypropylene films, with the most preferred materials being unoriented linear low density and ultra low density polyethylene films.
- a preferred polyethylene film is that available under the trade designation MaxileneTM 200 from Consolidated Thermoplastics Company, Schaumburg, Illinois.
- the backing may vary in overall thickness so long as it possesses sufficient integrity to be processable and handleable and provides the desired performance in respect to stretching properties for debonding the backing or tape from a surface.
- the specific overall thickness selected for a backing will depend upon the physical properties ofthe polymeric foam layer or layers and any solid polymeric film layer forming the backing. Where only one polymeric film or foam layer of a multi-layer backing is intended to be stretched to effect debonding, that layer should exhibit sufficient physical properties and be of a sufficient thickness to achieve that objective.
- a plastic polymeric film layer such as is contained in the constructions of Figures 9, 10, and 1 1 preferably will be about 0.4 to 10 mils in thickness, and will most preferably be about 0.4 to 6 mils in thickness.
- the adhesive ofthe adhesive layers can comprise any pressure-sensitive adhesive, with the particular adhesion properties being dependent on the use ofthe tape, with the preferred adhesion properties generally ranging from about 4 N/dm to about 200 N/dm, preferably from about 25 N/dm to about 100 N/dm, at a peel angle of 180°, measured according to PSTC-1 and PSTC-3 and ASTM D 903-83 at a peel rate of 12.7 cm/min. Adhesives having higher peel adhesion levels usually require backings having higher tensile strength.
- Pressure-sensitive adhesives suitable for application to one side ofthe 5 backing and/or the other in the tapes ofthe invention include tackified rubber adhesives, such as natural rubber; olefins; silicones; synthetic rubber adhesives such as polyisoprene, polybutadiene, and styrene-isoprene-styrene, styrene-ethylene- butylene-styrene and styrene-butadiene-styrene block copolymers, and other synthetic elastomers; and tackified or untackified acrylic adhesives such as l() copolymers of isooctylacrylate and acrylic acid, which can be polymerized by radiation, solution, suspension, or emulsion techniques.
- synthetic rubber adhesives or acrylics are synthetic rubber adhesives or acrylics.
- each adhesive layer can range from about 0.6 mils to about 40 mils (about 0.015 mm to about 1.0 mm), preferably from about 1 mils to about
- the thicker layers tend to cause the tapes to be more easily removable than do thinner layers. This is in contrast to conventional methods of removal, such as removal by peeling at peel angles of 90° or higher. In general, thicker layers of adhesive tend to cause the tapes to exhibit higher peel strength at a peel angle of
- the adhesive layer (or each adhesive layer)
- the exposed adhesive layer or layers may be laminated to a conventional release liner prior to use.
- Adhesives for adhering one polymeric foam layer to either another polymeric foam layer or a solid polymeric film layer include those pressure-sensitive adhesive compositions described above.
- the adhesive layer for adjoining one polymeric layer ofthe backing to another will be about 1 to 10 mils (about 0.025 to 0.25 mm) in thickness.
- Other methods of adhering the polymeric layers of the backing to one another include such conventional methods as co-extrusion or heat welding.
- the tape of this invention can be produced by any conventional method for preparing pressure-sensitive adhesive tapes.
- the adhesive can either be directly coated onto the backing, or it can be formed as a separate layer and then later laminated to the backing.
- Removing the tape from the surface of a substrate can be carried out by simply stretching the tape in a direction up to an angle of about 35° from the surface.
- the tape can be removed from the surface of a substrate by stretching the tape at an angle of no greater than about 10°. Removal at the appropriate angle will result in leaving no substantial or appreciable adhesive residue and in preventing the surface ofthe substrate from being damaged.
- Debonding of a highly elongated adhesive tape of this invention at low angles is characterized by a "sharp" type of crack propagation.
- a sharp crack leads to high stress concentration at the crack front, where there is a low volume of adhesive material (in which stress may be dissipated).
- High stress concentration at the crack front leads to what is called brittle cleavage failure ofthe adhesive. Such failure typically occurs with low force (because ofthe low amount of energy dissipated in the adhesive material) and is cleanly interfacial.
- the backing tends not to stretch and the adhesive tends to undergo filamentation and rupture cohesively.
- the adhesive tends to undergo filamentation and rupture cohesively.
- the adhesive tends to undergo filamentation and rupture cohesively.
- the adhesive tends to undergo filamentation and rupture cohesively.
- the tape of this invention can be used in several areas, including the following categories:
- mounting applications on surfaces such as painted wallboard, plaster, concrete, glass, metal or plastic, such as wall hangings, dispensers, wire clips, body side molding on vehicles, carrying handles, signing application, e.g., road signs, vehicle markings, transportation markings, and reflective sheetings, etc.;
- cushioning or sound deadening applications such as cushioning materials for placement beneath objects or sound insulative sheet materials
- closure applications such as container closures, e.g., box closures, closures for food and beverage containers, and the like; diaper closures; surgical drape closures; and the like; and
- removable labels such as price tags or identification labels on containers.
- the particular construction ofthe tape e.g., the type of backing, the type of adhesive compositions, and relative position of backing and adhesive layers, are often required to be different for each category of use.
- the amount of adhesive residue remaining on the painted wallboard was determined by visual inspection.
- Adhesive Compositions Used for Preparing Tapes ofthe Invention A Composition: KratonTM 1 118 75 pts
- KratonTM 1 1 18 is a styrene-butadiene block copolymer available from Shell Chemical Co.
- PiccolyteTM A135 is an alpha pinene resin available from Hercules Chemical
- ShellflexTM 371 is a naphthenic oil available from Shell Chemical Co. Df U.S. Patent No. 4,699,842, as follows:
- KratonTM 1657 is styrene-ethylene-butylene-styrene elastomer from Shell Chemical Company.
- RegalrezTM 1078 is a tackifier resin available from Hercules Incorporated.
- RegalrezTM 1018 is a tackifier resin available from Hercules Incorporated.
- TritonTM X-100 is non-ionic surfactant available from Rohm and Haas Co.
- TritonTM X-200 is an anionic surfactant available from Rohm and Haas Co.
- IrganoxTM 1076 is a phenolic based anti-oxidant available from Ciba-Geigy.
- CyanoxTM LTPD is a phenolic based anti-oxidant available from American Cyanamide Co.
- Example 1 Composition of Example 1 of U.S. Patent No. 5,143,972, prepared by combining Part A and Part B as follows:
- REZ-DTM is a tackifier resin available from Hercules Incorporated.
- TinuvinTM 328 is an ultraviolet inhibitor available from Ciba-Geigy Corp.
- FinapreneTM 1205 is a styrene-butadiene tapered di-block copolymer available from Fina Oil and Chemical Co.
- FinapreneTM 411 is a radial styrene-butadiene-styrene block copolymer available from Fina Oil and Chemical Co.
- EthanoxTM 330 is a phenolic based antioxidant available from Ethyl Corp.
- KratonTM 1107 is a styrene-isoprene-styrene block copolymer available from Shell Chemical Co.
- WingtackTM Extra is a hydrocarbon resin tackifier available from The
- Composition 2-mil and 5-mil adhesive transfer tapes available under the trade designations ScotchTM VHB F-9460PC and F-9469PC, respectively, from Minnesota Mining and Manufacturing Company of Saint Paul, Minnesota.
- G. Composition 2-mil and 5-mil adhesive transfer tapes available under the trade designations ScotchTM F-9752PC and F-9755PC, respectively, from Minnesota Mining and Manufacturing Company of Saint Paul, Minnesota.
- a 1 inch (2.54 cm) by 1 inch (2.54 cm) piece of double coated pressure- sensitive adhesive foam tape was prepared from 3M brand VHBTM 4945 double- coated pressure-sensitive adhesive foam tape, available from Minnesota Mining and Manufacturing Company of Saint Paul, Minnesota.
- the double-coated adhesive foam tape piece 10 was adhered to the back of a plastic hook 42 (as in Figure 4) in such a manner as to provide an extended foam tab 26.
- the standard silicone release paper provided on the 4945 tape was removed from the adhesive layer 14 and piece of that release paper was cut to a dimension of 1/4 inch (.635 cm) by 1 inch (2.54 cm) and reapplied as a release strip 30 to the top portion the adhesive layer 14 opposite from the tab 26.
- the adhesive layer 14 was adhered to a painted wallboard test panel, as described above. While holding onto the hook 42 with one hand, the adhesive foam tape 10 was stretched to remove the hook 42 from the surface of wall 44. Continued stretching ofthe tape 10 progressed to the point where complete debonding ofthe adhesive 14 from the wall surface occurred resulting in the removal ofthe hook 42. However, the area ofthe foam tape 50 directly opposite the side to which the release paper was applied still remained adhered to the back ofthe plastic hook. Once the hook 42 was removed from the wall 44, the remaining adhered foam tape, 1/4 inch by 1 inch area (.635 cm x 2.54 cm) was stretched and removed from the hook 42. The sequential release ofthe tape 10 when stretched removed cleanly from the painted drywall surface with no snap-back ofthe tape at debond.
- Example 2 The sequential release ofthe tape 10 when stretched removed cleanly from the painted drywall surface with no snap-back ofthe tape at debond.
- a tape was made according to Figure 9 using a VolaraTM 12E, 1/32 inch thick polyethylene vinyl acetate copolymer foam available from Voltek Division of Sekisui America Corporation of Lawrence, Massachusetts as layer 102, a 2 mil MaxileneTM 200 linear low density polyethylene film available from Consolidated Thermoplastics, Inc. of Schaumburg, Illinois as layer 104.
- the adhesive layers 106, 108, and 1 10 were a 3M brand VHBTM 9473 acrylic transfer adhesive, 10 mil thickness.
- the release strip 118 comprised a 3/16 inch length piece of standard silicone release paper.
- the release strip 1 18 was adhered to the adhesive layer 108 at the end of tape 100 opposite from a tab 1 16 formed from the foam layer 102, film layer 104, and adhesive layer 106.
- the release strip 1 18 provided an area of non- adhesion ofthe tape 100 to the hook 1 12 surface. Stretching of this release tape resulted in clean removal ofthe adhesive layers 108 and 1 10 with no catapulting of the hook
- a tape construction was prepared identical to that of Example 2, except that adhesive layer 106 and foam layer 102 were omitted to provide a film-backed adhesive tape construction. This film-backed tape cleanly removed with no catapulting ofthe hook upon removal.
- a tape construction was prepared according to Figure 10 using VolaraTM brand 4EO, 1/16 inch thick polyethylene vinyl acetate copolymer foam 204 heat laminated to a two mil ethylene vinyl acetate copolymer film 206, which composite is available from Voltek Division of Sekisui America Co ⁇ oration of Lawrence, Massachusetts as the film/foam laminate 202.
- Film layer 208 comprised a 2.5 mil MaxileneTM 200 linear low density polyethylene film available from Consolidated Thermoplastics, Inc. of Schaumburg, Illinois.
- the release strip 224 comprised a one mil polyester film 3/16 inch in length by the tape width.
- Adhesive layers 210, 212, and 214 comprised a rubber resin pressure-sensitive adhesive in accordance with the adhesive compositions detailed above.
- the polyester film release strip was used to provide an area of non-adhesion ofthe adhesive layer 210 to the surface of film 206 ofthe film/foam laminate 202 at the end ofthe tape 200 away from an extended tab 220.
- Film/foam laminate 202 was slit at the beginning ofthe extended portion making the tab to form a thick tab 220, and so that only the film layer 208 and adhesive layers 210 and 214 are stretched during tape stretching. Stretch release resulted in complete debonding of adhesive layer 210 from film layer 206 with subsequent complete debonding of adhesive layer 214 from the surface of wall 218.
- a tape construction was prepared according to Figure 1 1 using VolaraTM brand 6EO, 1/32 inch thick polyethylene vinyl acetate copolymer foam heat laminated to a two mil ethylene vinyl acetate copolymer film, which composite is available from Voltek Division of Sekisui America Corporation of Lawrence,
- Layer 302 comprised a VolaraTM brand 6EO, 1/32 inch thick polyethylene vinyl acetate copolymer foam adhered to layer 306 by a pressure-sensitive adhesive which, along with pressure- sensitive adhesive layer 312 and 314, comprised a rubber resin pressure-sensitive adhesive in accordance with the adhesive compositions detailed above.
- Release strip 324 comprised a one mil polyester film and was provided and the end of tape 300 opposite to a tab 320 formed by an extension of layers 302, 304, and 306. The adhesive layer 312 with the release strip 324 was adhered to a hook 316, and the adhesive layer 314 was adhered to a wallboard test panel. The sequential release of the tape 300 resulted in clean removal with no catapulting ofthe hook 316 upon removal.
- a tape 500 ofthe type illustrated in Figure 12 was prepared.
- the foam used in layer 516 was VolaraTM brand 6EO, 1/32 inch thick polyethylene vinyl acetate copolymer foam to which was heat laminated on both sides the layers 515 and 517 of a 1.75 mil XMAXTM 161.1 linear low density polyethylene film available from Consolidated Thermoplastics, Inc. of Schaumburg, Illinois.
- Adhesive layers 510 and 51 1 comprised a rubber resin pressure-sensitive adhesive in accordance with the adhesive compositions detailed above.
- the secondary end 523 ofthe adhesive layer 511 was spaced from the adjacent end of the adhesive layer 510 by about 0.18 inch or 0.46 centimeter.
- the adhesive layer 510 was adhered to a hook 501, and the adhesive layer 511 was adhered to a wallboard test panel 502.
- the sequential release ofthe tape 500 by pulling on the tab portion 507 resulted in clean removal with no catapulting ofthe hook 501 upon removal.
- a tape construction was prepared using an elastic solid adhesive product available from Beiersdorf AG of Hamburg, Germany commercially available as Tesa brand Power Strips.
- a release strip of 1/4 inch length and tape width was prepared from a portion ofthe release liner provided on the tape product and was applied to one end ofthe tape product away from a tab provided on the tape product.
- the modified tape product was applied to a hook and wall surface once with the release strip against the hook surface and a different time with the release strip against the wall surface. In both cases, sequential release resulted without snap-back or catapulting ofthe hook.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US217195P | 1995-08-11 | 1995-08-11 | |
US2171P | 1995-08-11 | ||
PCT/US1996/011396 WO1997007172A1 (en) | 1995-08-11 | 1996-07-10 | Removable adhesive tape with controlled sequential release |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0843709A1 true EP0843709A1 (en) | 1998-05-27 |
EP0843709B1 EP0843709B1 (en) | 1999-03-03 |
Family
ID=21699538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96925279A Expired - Lifetime EP0843709B1 (en) | 1995-08-11 | 1996-07-10 | Removable adhesive tape with controlled sequential release |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0843709B1 (en) |
JP (1) | JP3878988B2 (en) |
KR (1) | KR100397010B1 (en) |
AU (1) | AU701923B2 (en) |
CA (1) | CA2227475C (en) |
DE (1) | DE69601644T2 (en) |
WO (1) | WO1997007172A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3480568A1 (en) * | 2017-11-06 | 2019-05-08 | Yamaha Corporation | Sensor unit and musical instrument |
Families Citing this family (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9701329D0 (en) * | 1997-01-23 | 1997-03-12 | Merritt Adrian L | Improvements in and relating to materials |
GB9707625D0 (en) * | 1997-04-17 | 1997-06-04 | Fitton Ernest W | Sticky pins |
DE19750689A1 (en) | 1997-11-15 | 1999-06-02 | Beiersdorf Ag | Door and drawer lock |
NL1007603C2 (en) * | 1997-11-24 | 1999-05-26 | Johannes Wilhelmus Gerar Hooft | Fastener. |
DE19756816C1 (en) * | 1997-12-19 | 1999-02-04 | Beiersdorf Ag | Corner fastener for picture frame |
DE29824503U1 (en) | 1998-06-18 | 2001-09-06 | Beiersdorf Ag, 20253 Hamburg | Stripable stencil tape and its use |
US6162534A (en) * | 1998-08-31 | 2000-12-19 | 3M Innovative Properties Company | Stretch release adhesive article with secondary release member |
DE19842864A1 (en) * | 1998-09-19 | 2000-03-30 | Beiersdorf Ag | Adhesive film strips |
ES2163913T3 (en) * | 1998-09-25 | 2002-02-01 | Sika Ag | SPECIAL UNION BY ADHESIVE APPROPRIATE FOR A SIMPLE DISASSEMBLY. |
US6641910B1 (en) | 1999-08-24 | 2003-11-04 | 3M Innovative Properties Company | Stretch releasing adhesive tape with segmented release liner |
DE19956946B8 (en) | 1999-11-26 | 2005-01-20 | Tesa Ag | Packaging for adhesive films |
US6413626B1 (en) | 2000-06-08 | 2002-07-02 | 3M Innovative Properties Company | Wheel weight/tape article and a method of using |
US6569521B1 (en) * | 2000-07-06 | 2003-05-27 | 3M Innovative Properties Company | Stretch releasing pressure sensitive adhesive tape and articles |
DE10055942A1 (en) | 2000-11-10 | 2002-06-06 | Tesa Ag | PSAs and their use |
DE10063854A1 (en) | 2000-12-21 | 2002-09-05 | Tesa Ag | Removable device |
DE10064160A1 (en) | 2000-12-22 | 2002-08-14 | Tesa Ag | Adhesive tape strip |
DE10113422A1 (en) | 2001-03-20 | 2002-10-02 | Tesa Ag | Removable adhesive strip, e.g. for fixing posters, comprises flexible film base coated with polyurethane-based adhesive material containing aliphatic polyol-isocyanate system, filler and activator |
DE10150623A1 (en) * | 2001-10-12 | 2004-04-15 | Seeber Belgium N.V. | Adhesive tape with at least one cover layer, is cut near its end, perpendicularly to its longitudinal direction, to form a tear off strip |
DE10212049A1 (en) | 2002-03-19 | 2003-10-02 | Tesa Ag | PSA and process for the preparation thereof |
DE10252089A1 (en) | 2002-11-08 | 2004-05-27 | Tesa Ag | Adhesive and use of the same for a PSA strip made of at least one layer, which can be removed again without leaving any residue and without destruction by stretching it in the bonding plane |
DE10317788A1 (en) | 2003-04-16 | 2004-12-02 | Tesa Ag | Reusable, residue-free and damage-free removable elastic adhesive film |
JP4538201B2 (en) * | 2003-05-15 | 2010-09-08 | 株式会社ニトムズ | Stretch release tape |
JP2007169421A (en) * | 2005-12-21 | 2007-07-05 | Three M Innovative Properties Co | Removable pressure-sensitive adhesive tape and article-mounting kit |
JP5043340B2 (en) * | 2006-02-01 | 2012-10-10 | スリーエム イノベイティブ プロパティズ カンパニー | Article mounting kit |
DE102006038719A1 (en) | 2006-08-18 | 2008-02-21 | Tesa Ag | Pressure-sensitive adhesive strips for moisture-resistant, removable adhesive bonds |
WO2009114683A1 (en) * | 2008-03-14 | 2009-09-17 | 3M Innovative Properties Company | Stretch releasable adhesive tape |
DE102008021740A1 (en) | 2008-04-30 | 2009-11-05 | Tesa Se | Adhesive composition of ethylene polymer and use thereof for a pressure-sensitive adhesive film strip which can be detached again by stretching stretching substantially in the bonding plane residue and non-destructive |
CN102325850B (en) * | 2008-12-31 | 2014-03-12 | 3M创新有限公司 | Stretch releasable adhesive tape |
EP2438128B1 (en) * | 2009-06-04 | 2013-04-03 | 3M Innovative Properties Company | Stretch releasable pressure-sensitive adhesives |
JP5218367B2 (en) | 2009-10-07 | 2013-06-26 | 富士通株式会社 | Cable wiring structure and electronic equipment |
JP5263113B2 (en) | 2009-10-07 | 2013-08-14 | 富士通株式会社 | Electronics |
CN102736278B (en) * | 2011-04-01 | 2014-12-17 | 纬创资通股份有限公司 | Liquid crystal display device and electronic device comprising same |
JP2012146448A (en) * | 2011-01-11 | 2012-08-02 | Nitto Denko Corp | Method of manufacturing organic el device and substrate for manufacturing organic el device |
TWI499299B (en) | 2011-04-01 | 2015-09-01 | Wistron Corp | Flat panel display |
DE102012223670A1 (en) | 2012-12-19 | 2014-06-26 | Tesa Se | Removable pressure-sensitive adhesive strip |
DE202013012788U1 (en) | 2012-12-19 | 2019-08-29 | Tesa Se | Removable pressure-sensitive adhesive strip |
DE102013206624A1 (en) | 2013-04-15 | 2014-10-16 | Tesa Se | Pressure-sensitive adhesive and use of the same in a pressure-sensitive adhesive strip |
JP6265734B2 (en) * | 2013-12-26 | 2018-01-24 | スリーエム イノベイティブ プロパティズ カンパニー | Adhesive tape and tape substrate used therefor |
DE102014208264A1 (en) | 2014-04-30 | 2015-11-05 | Tesa Se | Adhesive tape for a removable adhesive film |
DE102014208263A1 (en) | 2014-04-30 | 2015-11-05 | Tesa Se | Detachment aid for a removable adhesive film |
DE202015009724U1 (en) | 2015-04-02 | 2019-08-16 | Tesa Se | Removable pressure-sensitive adhesive strip |
EP3581630B1 (en) | 2015-04-02 | 2021-07-14 | tesa SE | Removable adhesive tape |
DE202015009721U1 (en) | 2015-04-02 | 2019-08-23 | Tesa Se | Removable pressure-sensitive adhesive strip |
DE102015206076A1 (en) | 2015-04-02 | 2016-10-06 | Tesa Se | Removable pressure-sensitive adhesive strip |
DE202015009730U1 (en) | 2015-04-02 | 2019-09-06 | Tesa Se | Removable pressure-sensitive adhesive strip |
DE202015009141U1 (en) | 2015-10-15 | 2016-11-03 | Tesa Se | Adhesive composition, in particular for stripable adhesive strips, and use for bonding to coated woodchip wallpaper |
DE102015220072A1 (en) | 2015-10-15 | 2017-04-20 | Tesa Se | Self-adhesive articles and their use for bonding to coated woodchip wallpaper |
DE102016223852A1 (en) | 2016-11-30 | 2018-05-30 | Tesa Se | Removable pressure-sensitive adhesive strip |
DE102017203092A1 (en) | 2017-02-24 | 2018-08-30 | Tesa Se | Removable pressure-sensitive adhesive strip |
JP2020515324A (en) * | 2017-03-28 | 2020-05-28 | スリーエム イノベイティブ プロパティズ カンパニー | Shape-compatible adhesive article |
DE102017206083A1 (en) | 2017-04-10 | 2018-10-11 | Tesa Se | Bonding in electrochemical cells and stacking of electrochemical cells |
US20200124230A1 (en) * | 2017-06-28 | 2020-04-23 | 3M Innovative Properties Company | Adhesive mounting devices having patterned adhesive regions |
DE102017220998A1 (en) | 2017-11-23 | 2019-05-23 | Tesa Se | Removable pressure-sensitive adhesive strip |
DE102019204344A1 (en) | 2019-03-28 | 2020-10-01 | Tesa Se | Removable adhesive strip |
MX2022004685A (en) * | 2019-10-31 | 2022-05-10 | Kimberly Clark Co | Stack of absorbent sheets including a mounting system. |
GB2622613A (en) * | 2022-09-22 | 2024-03-27 | Jtape Ltd | Laminated adhesive tape |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW215105B (en) * | 1990-12-20 | 1993-10-21 | Minnesota Mining & Mfg | |
DE4233872C2 (en) * | 1992-09-30 | 1994-07-28 | Beiersdorf Ag | Removable, self-adhesive hook |
-
1996
- 1996-07-10 AU AU65430/96A patent/AU701923B2/en not_active Expired
- 1996-07-10 KR KR10-1998-0700983A patent/KR100397010B1/en not_active IP Right Cessation
- 1996-07-10 WO PCT/US1996/011396 patent/WO1997007172A1/en active IP Right Grant
- 1996-07-10 DE DE69601644T patent/DE69601644T2/en not_active Expired - Lifetime
- 1996-07-10 EP EP96925279A patent/EP0843709B1/en not_active Expired - Lifetime
- 1996-07-10 CA CA002227475A patent/CA2227475C/en not_active Expired - Lifetime
- 1996-07-10 JP JP50926897A patent/JP3878988B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9707172A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3480568A1 (en) * | 2017-11-06 | 2019-05-08 | Yamaha Corporation | Sensor unit and musical instrument |
US10883871B2 (en) | 2017-11-06 | 2021-01-05 | Yamaha Corporation | Sensor unit and musical instrument |
Also Published As
Publication number | Publication date |
---|---|
MX9801047A (en) | 1998-05-31 |
CA2227475A1 (en) | 1997-02-27 |
DE69601644D1 (en) | 1999-04-08 |
JP3878988B2 (en) | 2007-02-07 |
WO1997007172A1 (en) | 1997-02-27 |
KR19990036315A (en) | 1999-05-25 |
AU701923B2 (en) | 1999-02-11 |
DE69601644T2 (en) | 1999-10-28 |
JPH11510846A (en) | 1999-09-21 |
CA2227475C (en) | 2008-04-01 |
EP0843709B1 (en) | 1999-03-03 |
KR100397010B1 (en) | 2005-05-20 |
AU6543096A (en) | 1997-03-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0843709B1 (en) | Removable adhesive tape with controlled sequential release | |
US6001471A (en) | Removable adhesive tape with controlled sequential release | |
EP0716672B1 (en) | Removable foam adhesive tape | |
US7781056B2 (en) | Removable foam adhesive tape | |
US6403206B1 (en) | Removable foam adhesive tape | |
EP1037954B1 (en) | Removable adhesive tape laminate and separable fastener | |
US6413626B1 (en) | Wheel weight/tape article and a method of using | |
CA2339225C (en) | Stretch release adhesive article with secondary release member | |
US5516581A (en) | Removable adhesive tape | |
EP0563272B1 (en) | Removable adhesive tape | |
EP1392787B1 (en) | Adhesive article with progressive adhesive properties and method of using same | |
TW201811239A (en) | Adhesive mounting devices | |
CA2537418A1 (en) | Releasable adhesive tape | |
WO1999031407A1 (en) | Wheel weight/tape article and a method of using | |
MXPA98001047A (en) | Removable adhesive tape with sequential control control |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19980110 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE FR GB IT LI SE |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
17Q | First examination report despatched |
Effective date: 19980709 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR GB IT LI SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19990303 Ref country code: LI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19990303 Ref country code: CH Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19990303 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 69601644 Country of ref document: DE Date of ref document: 19990408 |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed |
Owner name: PORTA CHECCACCI & ASSOCIATI S.P.A. |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19990622 Year of fee payment: 4 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20070727 Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080710 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20150707 Year of fee payment: 20 Ref country code: GB Payment date: 20150708 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20150629 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69601644 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20160709 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20160709 |